A swing cylinder for backhoe loader

Abstract

The present invention discloses a swing oil cylinder for an excavator loader, and relates to the technical field of swing oil cylinders, and comprises a cylinder assembly, wherein the cylinder assembly comprises an oil cylinder shell. The swing oil cylinder for an excavator loader needs to be cleaned inside after the swing oil cylinder has been used for a period of time. During the cleaning, the first oil inlet and the second oil inlet need to be connected to a container containing a cleaning agent, and cleaning liquid is injected into the first oil inlet and the second oil inlet respectively, thereby pushing the piston to move inside the oil cylinder shell. When the piston moves, the movable sleeve is driven to move, and then the threaded groove outside the movable sleeve passes through a cleaning shovel pipe. A valve is provided outside the connecting pipe, and the valve is closed when oil is introduced, and the valve is opened when the cleaning agent is introduced. Under the action of the cleaning agent, impurities adhered to the inner wall of the threaded groove will be dissolved.

Description

Technical Field

[0001] The invention relates to the technical field of swing cylinders, in particular to a swing cylinder for an excavator loader. Background Art

[0002] An excavator loader is an engineering machinery that integrates excavation and loading functions. It usually has a chassis similar to a tractor, with a loading bucket installed in the front for loading materials such as soil, sand and gravel, and a small excavator's working device installed at the back, including a boom, a dipper arm and a bucket, which can perform excavation operations. This equipment is widely used in construction, municipal engineering, highway maintenance, agriculture and other fields. For example, on construction sites, it can be used to dig foundations and clean up construction waste, and at the same time load and transport construction materials. In agriculture, it can be used to dig irrigation ditches and load agricultural products.

[0003] Existing, such as Chinese patent publication number: CN219622981U, discloses a swing cylinder, including a cylinder barrel, a hollow screw is movably arranged in the cylinder barrel, the hollow screw divides the cylinder body into a rod chamber and a rodless chamber, the rear end of the cylinder barrel is fixedly connected with a fixed screw, the fixed screw passes through the hollow screw and is threadedly connected with the hollow screw to form a first spiral pair, the hollow screw is threadedly connected with the output nut to form a second spiral pair, the output nut is rotationally connected with the cylinder barrel and the hollow screw, and the output nut is axially limited by the end cover and the fixed screw, the rear end face of the output nut is exposed from the cylinder and serves as the torque output connection end face. In the above manner, the swing cylinder outputs torque through the output nut, thereby increasing the output torque, bearing higher loads, avoiding welding connection methods, and reducing damage to the cylinder.

[0004] However, in the prior art, the swing cylinder of the backhoe loader often works in some harsh environments with a lot of dust and impurities, such as construction sites, mines and other places. In this case, impurities, dust and other pollutants are easily mixed into the hydraulic oil of the swing cylinder. However, after a long period of work, the dust immersed in the hydraulic oil will easily adhere to the parts inside the swing cylinder that first contact the hydraulic oil. Excessive attachment of impurities will cause the swing cylinder to jam. However, the existing swing cylinder cannot automatically remove impurities attached to internal parts, resulting in the normal operation of the swing cylinder being affected.

[0005] Therefore, we propose a swing cylinder for an excavator loader to solve the above-mentioned problems. Summary of the invention

[0006] The object of the present invention is to provide a swing cylinder for an excavator loader to solve the problem in the background art that the existing swing cylinder cannot automatically remove impurities attached to internal parts, thereby affecting the normal operation of the swing cylinder.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a swing cylinder of an excavator loader, comprising a cylinder assembly, the cylinder assembly comprising a cylinder shell, a collecting assembly and a cleaning assembly are arranged outside the cylinder shell, the cleaning assembly comprises a connecting pipe, the inner wall of the connecting pipe is fixedly connected with a plurality of fixed pipes, a reinforcing ring is fixedly connected between one ends of the plurality of fixed pipes, a plurality of delivery pipes are fixedly connected with the inner wall of the reinforcing ring, the plurality of delivery pipes form a group of two, a cleaning shovel pipe is fixedly connected between one ends of each group of delivery pipes, and the cleaning shovel pipe is used to shovel and clean impurities, a filter screen is fixedly connected at the middle of the inner wall of each cleaning shovel pipe, and the filter screen is used to separate the shoveled impurities, a connecting pipe is fixedly connected at the top of the connecting pipe, and the plurality of fixed pipes all penetrate the cylinder shell to the outside; the collecting assembly comprises a collecting box, and the collecting box is used to collect the cleaned impurities, the collecting box is installed at the top of the cylinder shell, and the top end of the connecting pipe is fixedly connected to the inner side of the collecting box.

[0008] Preferably, a mounting bracket is fixedly connected to the outer surface of the oil cylinder housing, a suction pump is arranged on the top of the mounting bracket, and the suction pump is used to generate a strong suction force.

[0009] Preferably, an exhaust port is provided on the outer surface of the collection box, the input end of the suction pump is fixed on one side of the exhaust port, an isolation net is fixedly connected to the inner wall of the exhaust port, and the isolation net is used to prevent impurities inside the collection box from entering the suction pump and causing damage.

[0010] Preferably, the bottom of the oil cylinder housing is fixedly connected with supporting feet near both ends, and the supporting feet are used to install the swing oil cylinder on the frame of the excavator loader.

[0011] Preferably, the top of the cylinder housing is fixedly connected to a first oil inlet, and the first oil inlet is used to suck the hydraulic oil into one side area of ​​the cylinder housing, and the top of the cylinder housing is fixedly connected to a second oil inlet, and the second oil inlet is used to suck the hydraulic oil into the other side area of ​​the cylinder housing.

[0012] Preferably, one end of the oil cylinder housing is fixedly connected to a fixed end, an inner wall of the fixed end is rotatably connected to a rotating shaft, one end of the rotating shaft is fixedly connected to a rotating end, and one side of the rotating end is in contact with one side of the oil cylinder housing.

[0013] Preferably, a first sealing ring is fixedly sleeved on the outer surface of the rotating shaft near the other end, two first fixing grooves are opened on the outer surface of the first sealing ring, and the two first fixing grooves are fixedly connected with a first sealing ring, and the outer surface of the first sealing ring is tightly fitted with the inner wall of the cylinder housing.

[0014] Preferably, a second sealing ring is fixedly sleeved on the outer surface of the rotating shaft near one end, two second fixing grooves are opened on the outer surface of the second sealing ring, and the second fixing grooves are fixedly connected with a second sealing ring, and the outer surface of the second sealing ring is tightly fitted with the inner wall of the cylinder housing.

[0015] Preferably, a piston is fixedly connected to the middle of the outer surface of the rotating shaft, and the piston is used to separate the hydraulic oil inside the cylinder housing. A mounting groove is opened on the outer surface of the piston, and a protective sealing ring is fixedly connected to the inner wall of the mounting groove.

[0016] Preferably, a limiting screw ring is fixedly connected to the inner wall of the cylinder housing near the first oil inlet, a movable sleeve is fixedly connected to one side of the piston, a plurality of thread grooves are provided on the outer surface of the movable sleeve, the outer surface of the thread groove is threadedly connected to the inner surface of the limiting screw ring, a plurality of external threads are fixedly connected to the outer surface of the rotating shaft near the first sealing ring, the outer surface of the external threads is threadedly connected to the inner wall of the movable sleeve, the movable sleeve is movably connected to the outside of the rotating shaft, and each of the cleaning shovel tubes is respectively arranged inside each thread groove, and the cleaning shovel tube is used to shovel up impurities attached to the inner wall of the corresponding thread groove.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. During use, after the swing cylinder has been used for a period of time, it is necessary to clean the inside of it. During cleaning, the first oil inlet and the second oil inlet need to be connected to a container containing a cleaning agent, and cleaning liquid is injected into the first oil inlet and the second oil inlet respectively, thereby pushing the piston to move inside the cylinder shell. When the piston moves, it will drive the movable sleeve to move, and then the threaded groove outside the movable sleeve will pass through the cleaning shovel pipe. There is a valve on the outside of the connecting pipe. The valve is closed when oil is introduced, and the valve is opened when the cleaning agent is introduced. Under the action of the cleaning agent, impurities adhering to the inner wall of the threaded groove will be dissolved.

[0019] 2. During use, there is continuous scraping between the threaded groove and the cleaning shovel tube. The port of the cleaning shovel tube will shovel up the loose impurities on the inner wall of the threaded groove. The shoveled impurities enter the cleaning shovel tube under the action of inertia. The impurities are blocked by the filter plate, so that the impurities can be blocked inside the cleaning shovel tube and not discharged from the other end, while the liquid can be discharged. At this time, the suction pump is started to generate suction. Since the collecting box, connecting pipe, connecting pipe, fixing pipe, reinforcing ring and delivery pipe are all connected, the impurities mixed with the liquid in the cleaning shovel tube can be sucked away, and the internal parts of the swing cylinder can be cleaned without disassembly, avoiding the jamming of the internal parts of the swing cylinder due to excessive surface attachments.

[0020] 3. When in use, since the cylinder housing is the outermost protective structure of the entire swing cylinder, the cylinder housing is made of metal with high corrosion resistance, and the swing cylinder is used on an excavator loader, so two legs are needed to achieve this function. Round holes are opened at both ends of the two legs. When installing, the bolts should be passed through the round holes and then fixed on the excavator loader. The rotating end is connected to the base of the working device. By connecting the first oil inlet and the second oil inlet to the oil inlet pipeline, the first oil inlet is located in the middle of the cylinder housing. When the first oil inlet is filled with oil, the second oil inlet should be discharged. The first sealing ring and the first sealing ring are tightly fitted with the inner wall of the cylinder housing, which can prevent the hydraulic oil from leaking from the connection between the fixed end and the cylinder housing, and the second sealing ring and the second sealing ring are tightly fitted with the inner wall of the cylinder housing, which can prevent the hydraulic oil from leaking from the contact between the rotating end and the cylinder housing. In addition, by fixing the protective sealing ring at the inner groove of the piston, the hydraulic oil can be effectively prevented from flowing through the piston when the swing cylinder is working.

[0021] 4. When in use, hydraulic oil is injected into the first oil inlet, and the hydraulic oil fills the area on one side where the movable sleeve is located. As the hydraulic oil increases, the pressure on the piston becomes greater and greater, thereby generating a forward thrust on the piston. At the same time, the thread groove is meshed with the inner side of the limiting screw ring, so the movable sleeve will rotate while the piston is pushed, and the outer thread is meshed with the inner side of the movable sleeve. Then, the rotation of the movable sleeve will drive the shaft to rotate, thereby driving the rotating end to rotate. During the rotation, the rotating end is always in contact with the cylinder shell. When it is necessary to make the rotating end rotate in the opposite direction, just inject hydraulic oil into the second oil inlet to fill the corresponding area. When the hydraulic oil increases to form a thrust on the piston, the piston and the movable sleeve move back, and the rotation direction of the movable sleeve is opposite, so that the rotating end can rotate in the opposite direction, thereby achieving the benefit of adjusting the angle of the working device of the excavator loader by the swing cylinder, making the excavator loader more flexible in the working process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A side perspective view of a swing cylinder of an excavator loader according to the present invention;

[0023] Figure 2 It is a side perspective view of a swing cylinder of an excavator loader according to the present invention from another angle;

[0024] Figure 3 It is a front perspective view of a swing cylinder of an excavator loader of the present invention;

[0025] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle;

[0026] Figure 5 It is a partial three-dimensional diagram of a collection component of a swing cylinder of an excavator loader of the present invention;

[0027] Figure 6 It is a partial three-dimensional diagram of a cleaning component of a swing cylinder of an excavator loader of the present invention;

[0028] Figure 7 For the present invention Figure 6 Enlarged view of point B in the middle;

[0029] Figure 8 It is a partially cutaway perspective view of a cylinder assembly of a swing cylinder of an excavator loader according to the present invention;

[0030] Fig. 9 It is a cross-sectional perspective view of a cylinder assembly part of a swing cylinder of an excavator loader according to the present invention from another angle;

[0031] Fig.10 The present invention is a partial stereoscopic view of a cylinder assembly of a swing cylinder of an excavator loader.

[0032] In the figure:

[0033] 1. Cylinder assembly; 101. Cylinder housing; 102. First oil inlet; 103. Rotating shaft; 104. Fixed end; 105. Rotating end; 106. First sealing ring; 107. First sealing ring; 108. External thread; 109. Movable sleeve; 110. Thread groove; 111. Limiting screw ring; 112. Piston; 113. Protective sealing ring; 114. Second sealing ring; 115. Second sealing ring; 116. Second oil inlet; 2. Collecting assembly; 201. Collecting box; 202. Isolation net; 203. Suction pump; 204. Exhaust port; 205. Mounting bracket; 3. Cleaning assembly; 301. Connecting pipe; 302. Fixed pipe; 303. Reinforcement ring; 304. Delivery pipe; 305. Connecting pipe; 306. Cleaning shovel pipe; 307. Filter plate; 4. Support foot. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Example 1: Reference Figure 1 - Fig.10As shown, the present invention provides a technical solution: a swing cylinder for an excavator loader, comprising a cylinder assembly 1, the cylinder assembly 1 comprising a cylinder shell 101, a collecting assembly 2 and a cleaning assembly 3 are arranged outside the cylinder shell 101, the cleaning assembly 3 comprises a connecting pipe 301, the inner wall of the connecting pipe 301 is fixedly connected with a plurality of fixed pipes 302, one ends of the plurality of fixed pipes 302 are fixedly connected with a reinforcing ring 303, the inner wall of the reinforcing ring 303 is fixedly connected with a plurality of conveying pipes 304, the plurality of conveying pipes 304 are grouped in pairs, one end of each group of conveying pipes 304 is fixedly connected with a cleaning shovel pipe 306, and the cleaning shovel pipe 306 is used to shovel and clean impurities, and a filter screen plate 307 is fixedly connected at the middle of the inner wall of each cleaning shovel pipe 306, and the filter screen plate 307 is used to separate the shoveled impurities, and the connecting pipe 301 is fixedly connected with a plurality of fixed pipes 302, and a reinforcing ring 303 is fixedly connected between one ends of the plurality of fixed pipes 302, and the inner wall of the reinforcing ring 303 is fixedly connected with a plurality of conveying pipes 304, and the plurality of conveying pipes 304 are grouped in pairs, and one end of each group of conveying pipes 304 is fixedly connected with a cleaning shovel pipe 306, and the cleaning shovel pipe 306 is used to shovel and clean impurities, and the middle of the inner wall of each cleaning shovel pipe 306 is fixedly connected with a filter screen plate 307, and the filter screen plate 307 is used to separate the shoveled impurities, The top of the through pipe 301 is fixedly connected to a connecting pipe 305, and multiple fixed pipes 302 all penetrate the cylinder shell 101 to the outside; the collecting component 2 includes a collecting box 201, and the collecting box 201 is used to collect the cleaned impurities, the collecting box 201 is installed on the top of the cylinder shell 101, the top of the connecting pipe 305 is fixedly connected to the inner side of the collecting box 201, the outer surface of the cylinder shell 101 is fixedly connected to a mounting frame 205, a suction pump 203 is arranged on the top of the mounting frame 205, and the suction pump 203 is used to generate a strong suction force, an air suction port 204 is opened on the outer surface of the collecting box 201, the input end of the suction pump 203 is fixed on one side of the air suction port 204, the inner wall of the air suction port 204 is fixedly connected to an isolation net 202, and the isolation net 202 is used to prevent impurities inside the collecting box 201 from entering the suction pump 203 and causing damage.

[0036] In this embodiment, when in use, after the swing cylinder has been used for a period of time, it is necessary to clean the inside of it. When cleaning, the first oil inlet 102 and the second oil inlet 116 need to be connected to a container containing a cleaning agent, wherein the cleaning agent selected is excavator heavy machinery excavator grease hydraulic degreasing heavy oil pollution killer cleaning agent engineering strong dissolving cleaning, the product brand is Yangxing, and the product series is JXYW. At this time, by respectively injecting cleaning liquid into the first oil inlet 102 and the second oil inlet 116, the piston 112 is pushed to move inside the cylinder housing 101. When the piston 112 moves, it will drive the movable sleeve 109 to move. Then the threaded groove 110 outside the movable sleeve 109 will pass through the cleaning shovel pipe 306. The outside of the connecting pipe 305 is equipped with a valve. The valve is closed when oil is introduced and opened when the cleaning agent is introduced. Under the action of the cleaning agent, impurities adhered to the inner wall of the threaded groove 110 will be dissolved. When the threaded groove 110 is When the filter element 307 blocks the impurities, the impurities can be blocked inside the cleaning shovel tube 306 and not discharged from the other end, while the liquid can be discharged. At this time, the suction pump 203 is started to generate suction. Since the collecting box 201, the connecting pipe 305, the connecting pipe 301, the fixing pipe 302, the reinforcing ring 303 and the conveying pipe 304 are all connected, the impurities mixed with the liquid in the cleaning shovel tube 306 can be sucked away, and then the internal parts of the swing cylinder can be cleaned without disassembly, avoiding the jamming of the internal parts of the swing cylinder due to excessive surface attachments. The impurities are sucked into the collecting box 201 for subsequent centralized treatment, wherein the isolation net 202 can prevent the impurities from being sucked into the suction pump 203.

[0037] Embodiment 2: Figure 1 - Fig.10As shown, the bottom of the cylinder housing 101 is fixedly connected with support legs 4 near both ends, and the support legs 4 are used to install the swing cylinder on the frame of the excavator loader. The top of the cylinder housing 101 is fixedly connected with a first oil inlet 102, and the first oil inlet 102 is used to suck the hydraulic oil into one side area of ​​the cylinder housing 101. The top of the cylinder housing 101 is fixedly connected with a second oil inlet 116, and the second oil inlet 116 is used to suck the hydraulic oil into the other side area of ​​the cylinder housing 101. One end of the cylinder housing 101 is fixedly connected with a fixed end 104, and the inner wall of the fixed end 104 is rotated. The rotating shaft 103 is connected to the rotating end 105 at one end of the rotating shaft 103, and one side of the rotating end 105 is fitted with one side of the oil cylinder housing 101. The outer surface of the rotating shaft 103 is close to the other end and is fixedly sleeved with a first sealing ring 106. The outer surface of the first sealing ring 106 is provided with two first fixing grooves, and the two first fixing grooves are fixedly connected with a first sealing ring 107. The outer surface of the first sealing ring 106 is tightly fitted with the inner wall of the oil cylinder housing 101. The outer surface of the rotating shaft 103 is close to one end and is fixedly sleeved with a second sealing ring 114. The second sealing ring 114 The outer surface of the cylinder housing 101 is provided with two second fixed grooves, and the second fixed grooves are fixedly connected with a second sealing ring 115. The outer surface of the second sealing ring 114 is tightly fitted with the inner wall of the cylinder housing 101. The middle of the outer surface of the rotating shaft 103 is fixedly connected with a piston 112, and the piston 112 is used to separate the hydraulic oil inside the cylinder housing 101. The outer surface of the piston 112 is provided with a mounting groove, and the inner wall of the mounting groove is fixedly connected with a protective sealing ring 113. The inner wall of the cylinder housing 101 is fixedly connected with a limiting screw ring 111 near the first oil inlet 102, and one side of the piston 112 A movable sleeve 109 is fixedly connected, and a plurality of thread grooves 110 are provided on the outer surface of the movable sleeve 109. The outer surface of the thread groove 110 is threadedly connected to the inner surface of the limiting screw ring 111. A plurality of external threads 108 are fixedly connected to the outer surface of the rotating shaft 103 near the first sealing ring 106. The outer surface of the external threads 108 is threadedly connected to the inner wall of the movable sleeve 109. The movable sleeve 109 is movably connected to the outside of the rotating shaft 103. Each cleaning shovel tube 306 is respectively arranged inside each thread groove 110, and the cleaning shovel tube 306 is used to shovel up impurities attached to the inner wall of the corresponding thread groove 110.

[0038] In this embodiment, when in use, first, since the cylinder housing 101 is the outermost protective structure of the entire swing cylinder, the cylinder housing 101 is made of metal with high corrosion resistance, and the swing cylinder is used on an excavator loader, so two legs 4 are needed to achieve this function. Round holes are opened at both ends of the two legs 4. When installing, the bolts should be passed through the round holes and then fixed on the excavator loader. The rotating end 105 is connected to the base of the working device. By connecting the first oil inlet 102 and the second oil inlet 116 to the oil inlet pipeline, the first oil inlet 102 is located in the middle of the cylinder housing 101. When When oil is introduced into the first oil inlet 102, oil should be discharged from the second oil inlet 116. The first sealing ring 106 and the first sealing ring 107 are tightly fitted with the inner wall of the cylinder housing 101, so that the hydraulic oil can be prevented from leaking from the connection between the fixed end 104 and the cylinder housing 101. The second sealing ring 114 and the second sealing ring 115 are tightly fitted with the inner wall of the cylinder housing 101, so that the hydraulic oil can be prevented from leaking from the contact between the rotating end 105 and the cylinder housing 101. In addition, by fixing the protective sealing ring 113 at the inner groove of the piston 112, the hydraulic oil can be effectively prevented from flowing through the piston 112. When the swing cylinder is working, By injecting hydraulic oil into the first oil inlet 102, the hydraulic oil fills the area on one side of the movable sleeve 109. As the amount of hydraulic oil increases, the pressure on the piston 112 becomes greater and greater, thereby generating a forward thrust on the piston 112. At the same time, the thread groove 110 is meshed with the inner side of the limiting screw ring 111, so the movable sleeve 109 will rotate while the piston 112 is pushed, and the outer thread 108 is meshed with the inner side of the movable sleeve 109. The shaft 103 is rotated on the inner side of the fixed end 104 but cannot be pulled out. It is connected by a bearing, and the connection is an I-shaped structure. Then, the rotation of the movable sleeve 109 will drive the shaft 10 3 rotates, thereby driving the rotating end 105 to rotate. During the rotation, the rotating end 105 is always in contact with the cylinder housing 101. When the rotating end 105 needs to be rotated in the opposite direction, the hydraulic oil is injected into the second oil inlet 116 to fill the corresponding area. When the hydraulic oil increases to form a thrust for the piston 112, the piston 112 and the movable sleeve 109 move back, and the rotation direction of the movable sleeve 109 is opposite, so that the rotating end 105 can be rotated in the opposite direction, thereby achieving the benefit of adjusting the angle of the working device of the excavator loader by the swing cylinder, making the excavator loader more flexible in the working process.

[0039] The method of use and working principle of the device: When in use, since the cylinder housing 101 is the outermost protective structure of the entire swing cylinder, the cylinder housing 101 is made of metal with high corrosion resistance, and the swing cylinder is used on an excavator loader, so two support legs 4 are needed to achieve this function. Round holes are opened at both ends of the two support legs 4. When installing, the bolts should be passed through the round holes and then fixed on the excavator loader. The rotating end 105 is connected to the base of the working device. By connecting the first oil inlet 102 and the second oil inlet 116 to the oil inlet pipeline, the first oil inlet 102 is located in the middle of the cylinder housing 101. When the first oil inlet 102 is filled with oil, the second oil inlet 116 should discharge oil, and the oil inlet 116 should be connected to the working device. The first sealing ring 106 and the first sealing ring 107 are tightly fitted to the inner wall of the cylinder housing 101, so that the hydraulic oil can be prevented from leaking from the connection between the fixed end 104 and the cylinder housing 101. The second sealing ring 114 and the second sealing ring 115 are tightly fitted to the inner wall of the cylinder housing 101, so that the hydraulic oil can be prevented from leaking from the contact between the rotating end 105 and the cylinder housing 101. In addition, by fixing the protective sealing ring 113 at the inner groove of the piston 112, the hydraulic oil can be effectively prevented from flowing through the piston 112. When the swing cylinder is working, the hydraulic oil is injected into the first oil inlet 102, and the hydraulic oil fills the area on one side of the movable sleeve 109. As the hydraulic oil increases, the pressure on the piston 112 becomes greater. The larger the displacement, the forward thrust of the piston 112 is generated. At the same time, the thread groove 110 is meshed with the inner side of the limiting screw ring 111. Therefore, the movable sleeve 109 will rotate while the piston 112 is pushed. The outer thread 108 is meshed with the inner side of the movable sleeve 109. The rotating shaft 103 is rotated on the inner side of the fixed end 104 but cannot be pulled out. It is connected by a bearing, and the connection is an I-shaped structure. Then, the rotation of the movable sleeve 109 will drive the rotating shaft 103 to rotate, thereby driving the rotating end 105 to rotate. During the rotation, the rotating end 105 is always in contact with the cylinder housing 101. When the rotating end 105 needs to be reversed, just inject hydraulic oil into the second oil inlet 116 to fill the hydraulic oil. In the corresponding area, when the hydraulic oil increases to form a thrust on the piston 112, the piston 112 and the movable sleeve 109 move back, and the rotation direction of the movable sleeve 109 is opposite, so that the rotating end 105 can achieve reverse rotation. When in use, after the swing cylinder has been used for a period of time, it is necessary to clean the inside. When cleaning, the first oil inlet 102 and the second oil inlet 116 need to be connected to a container containing a cleaning agent. Among them, the cleaning agent selected is excavator heavy machinery excavator grease hydraulic degreasing heavy oil pollution killer cleaning agent engineering strong dissolving cleaning, the product brand is Yangxing, and the product series is JXYW. At this time, by injecting cleaning liquid into the first oil inlet 102 and the second oil inlet 116 respectively,Thereby, the piston 112 is pushed to move inside the oil cylinder housing 101. When the piston 112 moves, the movable sleeve 109 is driven to move. Then, the thread groove 110 outside the movable sleeve 109 will pass through the cleaning shovel tube 306. A valve is provided outside the connecting pipe 305. The valve is closed when oil is introduced and opened when detergent is introduced. Under the action of the detergent, impurities adhered to the inner wall of the thread groove 110 will be dissolved. When the thread groove 110 and the cleaning shovel tube 306 are continuously scraped, the end of the cleaning shovel tube 306 will remove the thread groove 110. The loose impurities on the inner wall are shoveled up, and the shoveled impurities enter the cleaning shovel tube 306 under the action of inertia. The impurities are blocked by the filter screen 307, so that the impurities are blocked inside the cleaning shovel tube 306 and not discharged from the other end, while the liquid can be discharged. At this time, by starting the suction pump 203, the suction pump 203 generates suction. Since the collection box 201, the connecting pipe 305, the connecting pipe 301, the fixing pipe 302, the reinforcing ring 303 and the conveying pipe 304 are all connected, the impurities mixed with the liquid inside the cleaning shovel tube 306 can be sucked away.

[0040] The wiring diagram of the suction pump 203 in the present invention is common knowledge in the art, and its working principle is a known technology. The model is selected according to the actual use, so the control method and wiring arrangement of the suction pump 203 are no longer explained in detail.

[0041] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A swing cylinder for an excavator loader, comprising a cylinder assembly (1), wherein the cylinder assembly (1) comprises a cylinder housing (101), a collecting assembly (2) and a cleaning assembly (3) are arranged outside the cylinder housing (101), and the characteristics are: The cleaning component (3) comprises a connecting pipe (301), the inner wall of the connecting pipe (301) is fixedly connected to a plurality of fixed pipes (302), one ends of the plurality of fixed pipes (302) are fixedly connected to a reinforcing ring (303), the inner wall of the reinforcing ring (303) is fixedly connected to a plurality of conveying pipes (304), the plurality of conveying pipes (304) form a group of two, one ends of each group of conveying pipes (304) are fixedly connected to a cleaning shovel pipe (306), and the cleaning shovel pipe (306) is used to shovel and clean impurities, the middle of the inner wall of each cleaning shovel pipe (306) is fixedly connected to a filter screen (307), and the filter screen (307) is used to separate the shoveled impurities, the top of the connecting pipe (301) is fixedly connected to a connecting pipe (305), and the plurality of fixed pipes (302) all penetrate the oil cylinder housing (101) to the outside; The collecting assembly (2) comprises a collecting box (201), and the collecting box (201) is used to collect cleaned impurities. The collecting box (201) is installed on the top of the oil cylinder housing (101), and the top end of the connecting pipe (305) is fixedly connected to the inner side of the collecting box (201).

2. The swing cylinder for backhoe loader according to claim 1, characterized in that: The outer surface of the oil cylinder housing (101) is fixedly connected to a mounting frame (205), a suction pump (203) is arranged on the top of the mounting frame (205), and the suction pump (203) is used to generate a strong suction force.

3. The swing cylinder for backhoe loader according to claim 2, characterized in that: An air suction port (204) is provided on the outer surface of the collection box (201); an input end of the suction pump (203) is fixed to one side of the air suction port (204); an isolation net (202) is fixedly connected to the inner wall of the air suction port (204); and the isolation net (202) is used to prevent impurities inside the collection box (201) from entering the suction pump (203) and causing damage.

4. The swing cylinder for backhoe loader according to claim 3, characterized in that: The bottom of the oil cylinder housing (101) is fixedly connected to supporting feet (4) near both ends, and the supporting feet (4) are used to mount the swing oil cylinder on the frame of the excavator loader.

5. The swing cylinder for backhoe loader according to claim 4, characterized in that: The top of the oil cylinder housing (101) is fixedly connected to a first oil inlet (102), and the first oil inlet (102) is used to suck hydraulic oil into a side area of ​​the oil cylinder housing (101); the top of the oil cylinder housing (101) is fixedly connected to a second oil inlet (116), and the second oil inlet (116) is used to suck hydraulic oil into a side area of ​​the oil cylinder housing (101).

6. The swing cylinder for backhoe loader according to claim 5, characterized in that: One end of the oil cylinder housing (101) is fixedly connected to a fixed end (104), an inner wall of the fixed end (104) is rotatably connected to a rotating shaft (103), one end of the rotating shaft (103) is fixedly connected to a rotating end (105), and one side of the rotating end (105) is in contact with one side of the oil cylinder housing (101).

7. The swing cylinder for backhoe loader according to claim 6, characterized in that: A first sealing ring (106) is fixedly sleeved on the outer surface of the rotating shaft (103) near the other end, and two first fixing grooves are provided on the outer surface of the first sealing ring (106), and both first fixing grooves are fixedly connected to a first sealing ring (107), and the outer surface of the first sealing ring (106) is tightly fitted to the inner wall of the oil cylinder housing (101).

8. The swing cylinder for backhoe loader according to claim 7, characterized in that: A second sealing ring (114) is fixedly sleeved on the outer surface of the rotating shaft (103) near one end, and two second fixing grooves are provided on the outer surface of the second sealing ring (114), and both second fixing grooves are fixedly connected to a second sealing ring (115), and the outer surface of the second sealing ring (114) is tightly fitted to the inner wall of the oil cylinder housing (101).

9. The swing cylinder for backhoe loader according to claim 8, characterized in that: A piston (112) is fixedly connected to the middle of the outer surface of the rotating shaft (103), and the piston (112) is used to separate the hydraulic oil inside the cylinder housing (101). A mounting groove is provided on the outer surface of the piston (112), and a protective sealing ring (113) is fixedly connected to the inner wall of the mounting groove.

10. The swing cylinder for backhoe loader according to claim 9, characterized in that: A limiting screw ring (111) is fixedly connected to the inner wall of the oil cylinder housing (101) near the first oil inlet (102); a movable sleeve (109) is fixedly connected to one side of the piston (112); a plurality of thread grooves (110) are provided on the outer surface of the movable sleeve (109); the outer surface of the thread groove (110) is threadedly connected to the inner surface of the limiting screw ring (111); a plurality of external threads (108) are fixedly connected to the outer surface of the rotating shaft (103) near the first sealing ring (106); the outer surface of the external threads (108) is threadedly connected to the inner wall of the movable sleeve (109); the movable sleeve (109) is movably connected to the outside of the rotating shaft (103); each of the cleaning shovel tubes (306) is respectively arranged inside each thread groove (110); the cleaning shovel tube (306) is used to shovel impurities attached to the inner wall of the corresponding thread groove (110).

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